Bobbin stripper



Oct. 29, 1935. v E. A. TERRELL 2,018,980

BOBBIN STRIPPER Filed Nov. 16, 1935' I Z0 l /0 wry mm rm/ rnL X L f n 1 O 0 MGM Q m. r N f M E3 /5 l 1 W Patented Oct. 29, 1935 UNITED STATES PATENT OFFICE BOBBIN STRIPPER N. 0., a corporation Application November 16, 1933, Serial No. 698,377

8 Claims.

This invention relates to that type of bobbin stripper in which the stripping is done by a pair of blades arranged to resiliently clasp the bobbin barrel and function to loosen and scrape the yarn bunch off the bobbin barrel when the head of the bobbin is grasped by a mechanism which pushes or pulls the bobbin from between the blades. The inner cooperating ends of the blades are provided with arcuate or other shape notches having bevelled edges so that when the bobbin is in place between the blades the notches form a hole or passage through which the bobbin barrel is endwisely moved in the scraping operation. A sample of this type of machine is illustrated in my former Patent 1,740,127, dated December 17, 1929.

An objection to this type of machine has been that when the bobbin is dropped into place between the blades it does not always properly seat 20 itself upon the head rest provided at a point adjacent the blades. Occasionally a bunch of waste will become lodged on the head rest and thus serve to prop up the bobbin high enough to prevent the notched scraping edges of the blades from properly clasping the bobbin barrel, with the result that the upper corners of the notched scraping edges, when the blades are thrust inwardly by their actuating springs, strike against the opposite sides of the bobbin and injure it by indentations. When the bobbin is of the Strawfeeler type, i. e., provided with a longitudinal slot, the aforesaid upper corners sometimes enter the slots and thus out and splinter the edges thereof. Furthermore, the penetration of the points into the wood of the bobbin or the slots thereof and the subsequent moving of the bobbin by the pushing or pulling means, frequently damage the blades by breaking off the points. It is the object of my present improvement to avoid thus injuring the bobbin barrels and scraper blades when, as above stated, the head of the bobbin does not settle down upon the head rest to its proper position.

Referring to the drawing annexed, Fig. 1 is a transverse sectional view of a part of the bobbin stripping machine showing my invention applied thereto.

Fig. 2 is a detail side elevation showing the manner in which my improvement protects the bobbin against indentations or bruising when the bobbin head fails to settle down to its proper p sition on its rest.

Fig. 3 is a view of the scraping end of one of the blades shown in Fig. 2.

Fig. 4 is a bottom plan view of the blade shown in Fig. 2, the blades being illustrated in their innermost position, i. e. in position'for scraping.

Fig. 5 is a View similar to Fig. 2 showing the action of the old type of scraper blade when the bobbin is prevented from resting on the head 5 rest.

Fig. 6 is a view of the scraping end of one of the scraping blades shown in Fig. 5.

Fig. 7 is a view similar to Fig. 5 showing the destructive operation of the old type of scraper 10 blades when they encounter the slots in a Strawfeeler bobbin.

Referring to the drawing annexed by reference characters, I ll designates the pair of scraping blades which are adapted to slide toward and from each other in housings I0, these housings being provided at their inner ends with the ledges or flanges I2 which form the rest for the head of the bobbin, immediately adjacent the scraping ends of the blades. The housing or guides H) are mounted on frame members l3 to support the mechanism for actuating the blades, the mechanism shown being the same as that covered by my aforementioned Patent No. 1,740,127. This mechanism consists in part of a rock shaft M, a lever l5 mounted thereon and pivotally attached to the outer ends of blades [0, together with a spring arrangement It for resiliently pressing the blades toward each other so that their inner arcuate edges 11 will, when the blades are allowed to? approach each other, resiliently grasp the bobbin barrel in the usual manner and thus insure the removal by a scraping action, of the waste bunch of yarn on the bobbin barrel, when the bobbin head is grasped by the usual puller jaws, not shown.

The blades in my present construction are increased in Width, as will be seen by comparison of Fig. 2 with Figs. 5 and 7, the latter being the old type of blade. This increase in width of the blade enables me to form at the upper edges of the blade, at its inner end, a. thickened bar or enlargement l8 whose inner fiat face l9 presents to the bobbin a broad, fiat abutment whose face is flush with the upper ends of the arcuate scraping edges 11. With the blades constructed in the foregoing manner it will be observed that should the bobbin fail to reach its seat, as it gravitates between the inner ends of the blades toward said seat, the-abutting faces l9 will contact with the opposite sides of the bobbin barrel and by reason of the fact that these faces are flat and broad injurious indentations of the wooden bobbin barrel will be avoided. Heretofore the upper corners of the arcuate ends of the scraping edges 55 have been so narrow that when they are projected by the springs against a misplaced bobbin they indent the bobbin and thus in time seriously injure it. This injury from indentation of the barrel of the bobbin cannot occur in my present invention, as is obvious.

The prevention of injury to the bobbin is brought about whether or not the bobbin be of the solid or non-slotted type shown in Fig. 5 or the Straw-feeler or slotted type shown in Figs. 2 and '7, because the abutments is are too broad on their faces to enter the slots and so the same results occur Whether the bobbin be slotted or non-slotted. In Fig. 2, I- have-illustrated the manner in which a bunch of waste, lodged on the head rest l2 will prop up the head of the bobbin (the head of the bobbin being shown by the dotted line 20) so that the arcuate scraping edges will be prevented from properly grasping the bobbin barrel and the bobbin will instead be clasped between the broad abutting faces IQ of the blades. Sometimes the bobbins will be propped up a little higher than shown in Fig. 2 or a little lower and therefore the upper or lower corner 2| will come in contact with the bobbin barrel; to prevent these corners injuring the wood of the bobbin I convexly round them as shown.

Another advantage of my invention is that with the two broad abutting faces I9 I avoid the necessity of nicely adjusting the strokes of the blades. With the old indenting-corner blades shown in Figs. 5 and 7, it is necessary to so nicely adjust the strokes of the blades as to prevent the upper and lower corners of the arcuate scraping points or corners from coming in contact, as repeated abutting contacts of these points or corners result in battering the same. This battering of these corners or edges is of course objectionable because in time this distortion of the shape of the scraping blades results in ineffective scraping action, and the blades have to be replaced. With my present invention the coming together of the broad abutment faces I9 by reason of the action of the springs does not batter or distort these surfaces, with the result that a nice adjustment of the strokes of the blades is rendered unnecessary and I therebydo away with one of the troubles of bobbin stripping machines of the old type.

A further advantage of my invention is that I avoid breakage of the points of the scraper ends of the blades. With the old type of blade, if the points penetrated the wood or entered the slots far enough, the endwise pulling or pushing of the bobbin would sometimes break off the points of the blades. This breakage of points is entirely avoided by the means I have adopted to prevent in any case any interlocking of the points with the bobbin so that no matter how abnormally the bobbin may be positioned with respect to the points of the blades the bobbin may be pushed.

. is the formation of a rather heavy or substantial comparatively-heavy bars not only provide the broad abutting surfaces I9, but also give soliclarity and strength to the blades so that the blades will not be injured when they are permitted to ram each other in the absence of a bobbin between them.

In accordance with the provisions of the pat- 5 ent statutes, I have herein described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiments thereof, but I desire to have it understood that the apparatus disclosed i0 is only illustrative and that the invention can be carried out by other means.

In addition to convexly rounding the horizontal corners 2|, it is desirable to also convexly round the vertical corners 22 of the abutments 15 in order that in case the bobbin shall lie askew when the jaws come together these corners will not indent the bobbin barrel.

I claim:

1. A bobbin cleaning machine embodying a pair of blades having notches at their inner ends for grasping the bobbin barrel, means for sliding the blades apart in a straight path and for resiliently pressing them toward each other, each of said blades being thickened at the bobbin- 25 entrance side to form a pair of opposing broadfaced abutments, said thickened part being in the form of a bar extending along one edge of the blade.

2. A bobbin cleaning machine embodying a 30' pair of blades having notches at their inner ends for grasping the bobbin barrel, means for sliding the blades apart in a straight path and for resiliently pressing them toward each other, each of said blades being thickened at the bobbinentrance side to form a pair of opposing broadfaced abutments, the abutment faces being flush with the upper ends of the arcuate scraping edges, said thickened part being in the form of a bar extending along one edge of the blade. 0

3. A bobbin cleaning machine embodying a pair of blades having notches at their inner ends for grasping the bobbin barrel, means for sliding the blades apart in a straight path and for resiliently pressing them toward each other, each of said blades being thickened at the bobbin-entrance side to form a pair of opposing broad-faced abutments, the upper and lower corners of said abutment faces being convexly rounded, said thickened part being in the form of a bar extending 50 along one edge of the blade.

4. A bobbin cleaning machine embodying a pair of blades having notches at their inner ends for grasping the bobbin barrel, means for sliding the blades apart in a straight path and for resilient- 55 ly pressing them toward each other, each of said blades being thickened at the bobbin-entrance side to form apair of opposing broad-faced abutments, said abutment faces being too wide to enter the usual longitudinal slots in the barrel of 50 a Straw-feeler bobbin.

5. A bobbin cleaning machine embodying a pair of blades having notches at their inner ends for grasping the bobbin barrel, means for sliding the blades apart in a straight path and for resiliently pressing them toward each other, each of said blades being thickened at the bobbin-entrance side to form a pair of opposing broadfaced abutments, the edges of said abutment faces being convexly rounded, said thickened part being in the form of a bar extending along one edge of the blade.

6. A bobbin cleaning machine embodying a pair of blades having edges at their inner ends for grasping the bobbin barrel, means for sliding 75 the blades apart in a straight path and for pressing them resiliently toward each other, each of said blades having an abutment-face at the bobbin-entrance side, each of said abutment faces having an area too great to permit penetration of the abutment-faces into the bobbin barrel when the maximum resilient pressure is applied to close the blades, each of said blades being provided with a bar extending along one longitudinal edge and having one end shaped to provide one of said abutting faces.

7. A bobbin cleaning machine embodying a pair of blades having notches at their inner ends for grasping the bobbin barrel, means for sliding the blades apart in a straight path and for resiliently pressing them toward each other, each of said blades being thickened at the bobbin-entrance side to term a pair of opposing approximately-rectangular broad-faced abutments, said abutment faces being too wide to enter the usual longitudinal slots in the barrel of a Strawfeeler bobbin.

8. A bobbin cleaning machine embodying a pair of blades having notches at their inner ends for grasping the bobbin barrel, means for sliding the blades apart in a straight path and for resiliently pressing them toward each other, each of 10 said blades being beveled oil back from said notches to thus form along one edge of the blade a bar having an approximately rectangular crosssection, said bar having its inner face approximately rectangular and flat to thus form a broadl5 .l'aced abutment.

EDGAR ALLEN TERREIL. 

